Khan Academy math question
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Mathematics, 21.06.2019 19:00
What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2
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Mathematics, 21.06.2019 19:10
At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) â sinh2(x) = 1 and (b) 1 â tanh 2(x) = sech 2(x). solution (a) cosh2(x) â sinh2(x) = ex + eâx 2 2 â 2 = e2x + 2 + eâ2x 4 â = 4 = . (b) we start with the identity proved in part (a): cosh2(x) â sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 â sinh2(x) cosh2(x) = 1 or 1 â tanh 2(x) = .
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Mathematics, 28.06.2019 19:00
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